含Nb-B贝氏体钢的热加工变形行为  

HOT WORK DEFORMATION BEHAVIOR OF NB-B BAINITE CONTAINING STEEL

作　　者：闫飞[1] 娄军魁[1] 韩绍根[1] 李新成[1] Yan Fei;Lou Junkui;Han Shaogan;Li Xincheng(Anyang Iron and Steel Group Co.,Ltd.)

机构地区：[1]安阳钢铁股份有限公司

出　　处：《河南冶金》2022年第6期6-9,共4页Henan Metallurgy

摘　　要：利用Gleeble-3800实验机研究含Nb-B贝氏体钢高温轧制变形行为,压缩工艺模拟参数为:温度(960~1080℃)和应变速率(0.01~10 s^(-1))并得到加工硬化曲线。通过加工硬化曲线得到了不同变形状态下的恢复行为,后续通过数据处理和分析拟合了贝氏体钢的热力学和动力学方程。结果表明:低应变速率下和较高的温度下进行变形,该钢较容易表征出明显的动态再结晶行为;在变形过程中增大应变速率或降低变形温度,均会降低实验钢的软化机制。采用线性回归计算出实验钢的动态再结晶激活能为3854.85 J/mol以及压缩温度在1050℃过程中发生动态再结晶的体积分数表达式。Gleeble-3800 testing machine was used to study the high temperature rolling deformation behavior of Nb-B containing bainitic steel,the parameters of rolling process simulation were:temperature(960~l 080℃)and strain rate(0.01~10 s^(-1))and the work-hardening curves were obtained.The recovery behaviors under different defonnation states were obtained from the work-hardening curves,and the thermodynamic and kinetic equations of bainitic steels were subsequently fitted by data processing and analysis.The results show that the steel is easier to characterize the significant dynamic recrystallization behavior when deformed at low strain rates and higher temperatures;increasing the strain rate or decreasing the deformation temperature during deformation reduces the softening mechanism of the experimental steel.A linear regression was used to calculate the dynamic recrystallization activation energy of the experimental steel of 3854.85 J/mol and the expression for the volume fraction of dynamic recrystallization occurring during the compression temperature of 1050T.

关 键 词：贝氏体钢 高温变形 动力学方程 动态再结晶体积分数 

分 类 号：TG142.1[一般工业技术—材料科学与工程]